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            <small>
              <a href="#Procedure">Procedure<br></a>
              <a href="#Abstract">Abstract<br></a>
              <a href="#Required_Reading">Required_Reading<br></a>
              <a href="#Keywords">Keywords<br></a>
              <a href="#Brief_I/O">Brief_I/O<br></a>
              <a href="#Detailed_Input">Detailed_Input<br></a>

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              <small>               <a href="#Detailed_Output">Detailed_Output<br></a>
              <a href="#Parameters">Parameters<br></a>
              <a href="#Exceptions">Exceptions<br></a>
              <a href="#Files">Files<br></a>
              <a href="#Particulars">Particulars<br></a>
              <a href="#Examples">Examples<br></a>

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              <small>               <a href="#Restrictions">Restrictions<br></a>
              <a href="#Literature_References">Literature_References<br></a>
              <a href="#Author_and_Institution">Author_and_Institution<br></a>
              <a href="#Version">Version<br></a>
              <a href="#Index_Entries">Index_Entries<br></a>
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<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void nvp2pl_c ( ConstSpiceDouble    normal[3],
                   ConstSpiceDouble    point [3],
                   SpicePlane        * plane     ) 

</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Make a CSPICE plane from a normal vector and a point. 
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   <a href="../req/planes.html">PLANES</a> 
 </PRE>
<h4><a name="Keywords">Keywords</a></h4>
<PRE>
 
   GEOMETRY 
   MATH 
   PLANE 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
 
   Variable  I/O  Description 
   --------  ---  -------------------------------------------------- 
   normal, 
   point      I   A normal vector and a point defining a plane. 
   plane      O   A CSPICE plane structure representing the plane. 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   normal, 
   point 
                  are, respectively, a normal vector and point that 
                  define a plane in three-dimensional space.  normal 
                  need not be a unit vector. Let the symbol &lt; a, b &gt; 
                  indicate the inner product of vectors a and b; 
                  then the geometric plane is the set of vectors x 
                  in three-dimensional space that satisfy 
 
                     &lt; x - point, normal &gt;  =  0. 
 </PRE>
<h4><a name="Detailed_Output">Detailed_Output</a></h4>
<PRE>
 
   plane          is a CSPICE plane structure that represents the 
                  geometric plane defined by point and normal. 
 </PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   1)  If the input vector normal is the zero vector, the error 
       SPICE(ZEROVECTOR) is signaled. 
 </PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Particulars">Particulars</a></h4>
<PRE>
   CSPICE geometry routines that deal with planes use the `plane' 
   data type to represent input and output planes.  This data type 
   makes the subroutine interfaces simpler and more uniform. 
 
   The CSPICE routines that produce CSPICE planes from data that 
   define a plane are: 
 
      <a href="nvc2pl_c.html">nvc2pl_c</a> ( Normal vector and constant to plane ) 
      <b>nvp2pl_c</b> ( Normal vector and point to plane    ) 
      <a href="psv2pl_c.html">psv2pl_c</a> ( Point and spanning vectors to plane ) 
 
   The CSPICE routines that convert CSPICE planes to data that 
   define a plane are: 
 
      <a href="pl2nvc_c.html">pl2nvc_c</a> ( Plane to normal vector and constant ) 
      <a href="pl2nvp_c.html">pl2nvp_c</a> ( Plane to normal vector and point    ) 
      <a href="pl2psv_c.html">pl2psv_c</a> ( Plane to point and spanning vectors ) 
 
   Any of these last three routines may be used to convert this 
   routine's output, plane, to another representation of a 
   geometric plane. 
 </PRE>
<h4><a name="Examples">Examples</a></h4>
<PRE>
 
   1)  Project a vector v orthogonally onto a plane defined by point 
       and normal.  proj is the projection we want; it is the 
       closest vector in the plane to v. 
 
          <b>nvp2pl_c</b> ( normal,  point,   &amp;plane ); 
          <a href="vprjp_c.html">vprjp_c</a>  ( v,       &amp;plane,  proj   );
 
 
   2)  Given a point in a plane and a normal vector, find the 
       distance of the plane from the origin.  We make a 
       `plane' from the point and normal, then convert the 
       plane to a unit normal and constant.  The output constant 
       is (according to the specification of <a href="pl2nvc_c.html">pl2nvc_c</a>) the distance of 
       the plane from the origin. 
 
          <b>nvp2pl_c</b> ( normal,  point,  &amp;plane   ); 
          <a href="pl2nvc_c.html">pl2nvc_c</a> ( &amp;plane,  normal, constant );
          
 </PRE>
<h4><a name="Restrictions">Restrictions</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Literature_References">Literature_References</a></h4>
<PRE>
 
   [1] `Calculus and Analytic Geometry', Thomas and Finney. 
 </PRE>
<h4><a name="Author_and_Institution">Author_and_Institution</a></h4>
<PRE>
 
   N.J. Bachman   (JPL) 
 </PRE>
<h4><a name="Version">Version</a></h4>
<PRE>
 
   -CSPICE Version 1.0.0, 05-MAR-1999 (NJB)
</PRE>
<h4><a name="Index_Entries">Index_Entries</a></h4>
<PRE>
 
   normal vector and point to plane 
 </PRE>
<h4>Link to routine nvp2pl_c source file <a href='../../../src/cspice/nvp2pl_c.c'>nvp2pl_c.c</a> </h4>

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   <pre>Wed Jun  9 13:05:27 2010</pre>

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